code: def test_fast_slow_arg_builtins(function_proxy):
      # test that builtins are accessible in the result of
      # _fast_arg() and _slow_arg()
  
      _, _, x = function_proxy
  
      def func():
          x  # nonlocal x ensures _fast_arg() makes a copy
          return len([1])
  
      assert _slow_arg(func)() == 1
      assert _fast_arg(func)() == 1
  
imports: import inspect
  from functools import partial
  from io import StringIO
  import numpy
  import pytest
  from cudf.pandas.fast_slow_proxy import _fast_arg, _FunctionProxy, _slow_arg, _transform_arg, _Unusable, make_final_proxy_type, make_intermediate_proxy_type
label_desc: Use image node_id 8 for calling a global function with example usage: test_fast_slow_arg_builtins(function_proxy) and returns: len